| 摘要 |
The present specification discloses a cover which is arranged on the top of a container for accepting a treating target and comprises a cover main body and a striking member. The cover main body has an area to cover the top of the container. A cooling path to allow refrigerants to flow is formed in the cover main body. The striking member moves along the cooling path and strikes the inner circumference of the cooling path. The moving area of the striking member is arranged in the lower area of the cooling path. Therefore, the cover is capable of continuously removing base metal intensively adhering to the bottom of the cover main body using the striking member. |
